Here's a breakdown:

* Ribosomes: These are small, complex structures made of RNA and protein. They act as the "protein factories" of the cell.

* DNA: The instructions for making proteins are encoded in DNA, which resides in the nucleus of the cell.

* Transcription: DNA's instructions are copied into messenger RNA (mRNA) in the nucleus.

* Translation: mRNA travels out of the nucleus to the ribosomes. At the ribosome, the mRNA code is read and translated into a chain of amino acids, which fold into a specific protein.

So, the process of protein synthesis involves multiple steps and components, but the ribosome is the key player where the actual building of the protein occurs.